The Fault in Our Stars has found its Isaac! EW has learned exclusively that Nat Wolff, seen most recently in Stuck in Love (with Fault director Josh Boone) and Admission, has been cast in the adaptation of the best-selling John Green novel.

Wolff’s role is a pivotal one: Isaac is a close friend of Augustus Waters (Ansel Elgort) and is responsible for bringing him to the teenage cancer support group where Augustus and Hazel Grace (Shailene Woodley) first meet.

Woodley and Elgort just finished worked on the recently wrapped Divergent and will have only a short break before beginning production on The Fault in Our Stars next month in Pittsburgh.